Nested Card inside Accordion's `body` missing bottom border
Created by: JJCoolBean
When nesting a card inside an accordion's card body, the nested card inside the card body of an accordion is missing the bottom border.
- Operating system and version: Windows 7 SP1 64 bit
- Browser and version: Chome 69.0.3497.100
- Reduced test case: https://codepen.io/JJCoolBean/pen/KGraWv